题目内容：
2，3，4，X，5这五个数的平均数是4，则X=（ ）。
A．4 B．5
C．6
D．7
参考答案：
答案解析：
单选题：2，3，4，X，5这五个数的平均数是4，则X=（ ）。
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- 题目类型：单选题
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B．5
C．6
D．7
B．5
C．6
D．7
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